Home / 21,234.17-31,816.63-12,916.74

Finding the Fourth Proportional to 21,234.17, 31,816.63 and 12,916.74

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Solution

The fourth proportional to 21,234.17, 31,816.63 and 12,916.74 is: 19,354.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,234.17 : 31,816.63 = 12,916.74 : x
  2. Step 2: Convert to fraction form
    21,234.17/31,816.63 = 12,916.74/x
  3. Step 3: Cross multiply
    21,234.17x = 31,816.63 × 12,916.74
  4. Step 4: Simplify right side
    21,234.17x = 410,967,137.39
  5. Step 5: Solve for x
    x = 410,967,137.39/21,234.17
  6. Step 6: Final answer
    x = 19,354.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.